eio_nop

(PECL eio >= 0.0.1dev)

eio_nop — Does nothing, except go through the whole request cycle

eio_nop(int $pri = EIO_PRI_DEFAULT, callable $callback = NULL, mixed $data = NULL): resource

eio_nop() does nothing, except go through the whole request cycle. Could be useful in debugging.

pri

请求的优先级：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 将设为 EIO_PRI_DEFAULT。

callback

callback 函数在请求完成时被调用。其应匹配一下原型：

void callback(mixed $data, int $result[, resource $req]);

data

Arbitrary variable passed to callback.

eio_nop() returns request resource on success, 或者在失败时返回 false.